Home / 39,278.81-54,205.95-21,372.75

Finding the Fourth Proportional to 39,278.81, 54,205.95 and 21,372.75

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Solution

The fourth proportional to 39,278.81, 54,205.95 and 21,372.75 is: 29,495.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,278.81 : 54,205.95 = 21,372.75 : x
  2. Step 2: Convert to fraction form
    39,278.81/54,205.95 = 21,372.75/x
  3. Step 3: Cross multiply
    39,278.81x = 54,205.95 × 21,372.75
  4. Step 4: Simplify right side
    39,278.81x = 1,158,530,217.86
  5. Step 5: Solve for x
    x = 1,158,530,217.86/39,278.81
  6. Step 6: Final answer
    x = 29,495.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.